Roman Temple Under London: Restored Mithraeum Opens

An employee poses alongside a reconstruction of the Roman Temple of Mithras, recreated on the site of its original discovery, during a press preview at the London Mithraeum, Bloomberg SPACE, at the new Bloomberg headquarters in central London, on Nov. 7, 2017. (Daniel Leal-Olivas/AFP/Getty Images)

A reconstructed Roman temple has been opened deep under the city of London, at the Bloomberg European headquarters site.

The ruins of the London Mithraeum, a temple dedicated to the Roman god Mithras, was discovered on the WWII bomb site in 1954. It is considered to be one of the most amazing archaeological discoveries of the 20th century in Britain, according to Archaeology at Bloomberg, a guide documenting the site's history.

"This really was one of the most important discoveries in London, if not in Britain, in the 20th century."

The free museum is the brainchild of a U.S. experience design studio Local Projects, which previously worked on the National September 11 Memorial Museum in New York, architectural magazine Dezeen noted.

"This is very self-consciously meant to be a beautiful and minimalist experience," Local Projects founder Jake Barton told the magazine.

"Being able to stand inside of that Mithraeum, with the walls being created around you, listening to the ritual, gets people activated and engaged because they're somehow projecting themselves into the space and projecting themselves into that time."